lpe-interpolate_points.cpp

Go to the documentation of this file.

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Authors:
 *   Johan Engelen
 *
 * Copyright (C) Johan Engelen 2014 <j.b.c.engelen@alumnus.utwente.nl>
 *
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
 
#include "live_effects/lpe-interpolate_points.h"
#include "live_effects/lpe-powerstroke-interpolators.h"
// TODO due to internal breakage in glibmm headers, this must be last:
#include <glibmm/i18n.h>
 
namespace Inkscape {
namespace LivePathEffect {
 
 
static const Util::EnumData<unsigned> InterpolatorTypeData[] = {
    {Geom::Interpolate::INTERP_LINEAR          , N_("Linear"), "Linear"},
    {Geom::Interpolate::INTERP_CUBICBEZIER          , N_("CubicBezierFit"), "CubicBezierFit"},
    {Geom::Interpolate::INTERP_CUBICBEZIER_JOHAN     , N_("CubicBezierJohan"), "CubicBezierJohan"},
    {Geom::Interpolate::INTERP_SPIRO  , N_("SpiroInterpolator"), "SpiroInterpolator"},
    {Geom::Interpolate::INTERP_CENTRIPETAL_CATMULLROM, N_("Centripetal Catmull-Rom"), "CentripetalCatmullRom"}
};
static const Util::EnumDataConverter<unsigned> InterpolatorTypeConverter(InterpolatorTypeData, sizeof(InterpolatorTypeData)/sizeof(*InterpolatorTypeData));
 
LPEInterpolatePoints::LPEInterpolatePoints(LivePathEffectObject *lpeobject)
    : Effect(lpeobject)
    , interpolator_type(
          _("Interpolator type:"),
          _("Determines which kind of interpolator will be used to interpolate between stroke width along the path"),
          "interpolator_type", InterpolatorTypeConverter, &wr, this, Geom::Interpolate::INTERP_CENTRIPETAL_CATMULLROM)
{
    show_orig_path = false;
 
    registerParameter( &interpolator_type );
}
 
LPEInterpolatePoints::~LPEInterpolatePoints() = default;
 
Geom::PathVector
LPEInterpolatePoints::doEffect_path (Geom::PathVector const & path_in)
{
    Geom::PathVector path_out;
    std::unique_ptr<Geom::Interpolate::Interpolator> interpolator(  Geom::Interpolate::Interpolator::create(static_cast<Geom::Interpolate::InterpolatorType>(interpolator_type.get_value())) );
 
    for(const auto & path_it : path_in) {
        if (path_it.empty())
            continue;
 
        if (path_it.closed()) {
            g_warning("Interpolate points LPE currently ignores whether path is closed or not.");
        }
 
        std::vector<Geom::Point> pts;
        pts.push_back(path_it.initialPoint());
 
        for (Geom::Path::const_iterator it = path_it.begin(), e = path_it.end_default(); it != e; ++it) {
            pts.push_back((*it).finalPoint());
        }
 
        Geom::Path path = interpolator->interpolateToPath(pts);
 
        path_out.push_back(path);
    }
 
    return path_out;
}
 
 
} //namespace LivePathEffect
} /* namespace Inkscape */
 
/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :